White, narrow-tubular, highly fragrant flowers are most likely pollinated by
a. moths.
b. butterflies.
c. hummingbirds.
d. bees.
e. flies.
A
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Which is another name for bone cells that remain alive even after the extracellular matrix becomes hardened with calcium phosphate crystals?
A. osteocytes B. erythrocytes C. leukocytes D. fibrocytes E. chrondrocytes
Cold viruses are transmitted by ________.
A. droplet contact B. direct contact C. indirect contact D. All of the choices are correct.
The contractile unit of a skeletal muscle fiber
is a(an) ___.
a. myofibril b. sarcomere c. myosin filament d. actin filament e. Z line
Asexual reproduction _____
a. results from fertilization
b. produces genetic clones c. is more similar to meiosis than mitosis d. leads to increased genetic variation in offspring e. involves crossing over